Text Diff Checker
Compare two versions of text and see exactly what changed, word by word or character by character.
Runs in your browser. Nothing is uploaded.Text Diff Checker in 3 steps
Paste both versions
Add the original text on the left and the edited version on the right.
Choose comparison level
Word-level highlights whole changed words; character-level catches small edits like typo fixes.
Compare and review
Click Compare. Additions are highlighted in mint, deletions in red, with a total change count.
Why use this Text Diff Checker
Questions about this tool
What is the difference between word-level and character-level comparison?
Word-level treats each whole word as a unit, so replacing "quick" with "fast" shows as one change. Character-level compares individual characters, which is more precise for catching small edits like fixing a typo within a word.
Does this work for comparing code?
It works on any plain text including code, though a dedicated code-diff tool with syntax awareness may highlight logical changes more meaningfully for programming languages.
Why do inline and side-by-side views look different?
Inline view merges both texts into one flowing passage with additions and deletions marked in place. Side-by-side view splits the same comparison into two columns — the original on the left with removals marked, the changed version on the right with additions marked — which some people find easier to scan.
Is there a text length limit?
No hard limit, but very large documents (tens of thousands of words) may take a moment longer to compare since the diff algorithm runs entirely in your browser.